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USN-4690-1: coTURN vulnerability

11 January 2021

coTURN could be made to crash or run programs if it received specially crafted network traffic.



  • coturn - TURN and STUN server for VoIP


It was discovered that coTURN allowed peers to connect and relay packets to
loopback addresses in the range of 127.x.x.x. A malicious user could use this
vulnerability to insert packages into the loopback interface.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.